Method for inhibiting current harmonics based on FFT (Fast Fourier Transform)
A technology of Fourier transform and current suppression, applied in AC network to reduce harmonic/ripple, harmonic reducing device, measuring current/voltage, etc., can solve the problem of large error, inability to obtain harmonic amplitude and phase information, design Difficulty and other issues
Inactive Publication Date: 2016-07-13
LEIHUA ELECTRONICS TECH RES INST AVIATION IND OF CHINA
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AI-Extracted Technical Summary
Problems solved by technology
The invention belongs to the technical field of power grid harmonic detection, and relates to a method for inhibiting current harmonics based on FFT (Fast Fourier Transform). According to the technical scheme of the invention, the method can extract any harmonic and the sum of harmonic components meeting conditions. When a load harmonic current exceeds the compensation capacity of an APF, the method can select the characteristic harmonics with the bigger dangers to be compensated. The method can carry out IFFT of the harmonics meeting the conditions, and then extracts the sum of a part of harmonic components, so that the APF just compensates the needed harmonics in an occasion where the method is used cooperatively with a passive filter.
Current/voltage measurementHarmonic reduction arrangement +1
PhysicsFft fast fourier transform +4
- Experimental program(1)
Description & Claims & Application Information
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